On Tue, Jun 12, 2012 at 01:58:23PM -0700, H. Peter Anvin wrote:> There is a difference here. Mixed steppings or even mixed CPUs are,> indeed, supported (even things like Nehalem + Westmere in the same> system). However, the notion is that we should upload the *entire set*> of microcodes to the kernel, and let it flash the appropriate one into> each CPU.

Sure, the ucode driver both on Intel and AMD does that already bylooking at each patch in the blob. I'd expect no change to thatfunctionality.